Classification
330 - Economics
1,195
320 - Political science
117
339 - Macroeconomics & related topics
86
333 - Economics of land & energy
85
300 - Social sciences
62
362 - Social welfare problems & services
54
338 - Production
52
363 - Other social problems & services
42
700 - The arts; fine & decorative arts
40
140 - Specific philosophical schools
34
900 - History & geography
34
610 - Medicine & health
33
340 - Law
32
380 - Commerce, communications & transportation
28
000 - Computer science, information & general works
26
305 - Social groups
24
370 - Education
23
361 - Social problems & social welfare in general
21
304 - Factors affecting social behavior
20
600 - Technology
20
100 - Philosophy & psychology
18
630 - Agriculture & related technologies
17
551 - Geology, hydrology & meteorology
15
658 - General management
15
200 - Religion
11
331 - Labor economics
9
170 - Ethics
8
301 - Sociology & anthropology
8
360 - Social problems & services; associations
7
620 - Engineering & allied operations
7
303 - Social processes
6
332 - Financial economics
6
337 - International economics
6
306 - Culture & institutions
5
576 - Genetics & evolution
5
820 - English & Old English literatures
5
580 - Plants (Botany)
4
800 - Literature & rhetoric
4
240 - Christian moral & devotional theology
3
297 - Islam, Babism & Bahai Faith
3
336 - Public finance
3
381 - Commerce
3
500 - Natural sciences & mathematics
3
530 - Physics
3
581 - Specific topics in natural history
3
001 - Knowledge
2
070 - News media, journalism & publishing
2
160 - Logic
2
201 - Religious mythology & social theology
2
261 - Social theology
2
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